Merge master into 7.0

CONTRIBUTING.md

@@ -9,6 +9,8 @@
    |
    <strong><a href="#writing-tests">Writing tests</a></strong>
    |
+   <strong><a href="#debugging-code">Debugging code</a></strong>
+   |
    <strong><a href="#internals">Internals</a></strong>
 </p>
 
@@ -127,7 +129,8 @@ $ TEST_DEBUG=true make test
 To test the code coverage, use:
 
 ```sh
-$ make test-cov
+$ BABEL_ENV=cov make build
+$ ./scripts/test-cov.sh
 ```
 
 #### Writing tests
@@ -199,9 +202,46 @@ For both `babel-plugin-x` and `babylon`, you can easily generate an `expected.js
             - expected.json (will be generated if not created)
 ```
 
+#### Debugging code
+
+A common approach to debugging JavaScript code is to walk through the code using the [Chrome DevTools](https://developers.google.com/web/tools/chrome-devtools/) debugger.
+For illustration purposes, we are going to assume that we need to get a better understanding of [`Generator.generate()`](https://github.com/babel/babel/blob/b5246994b57f06af871be6a63dcc4c6fd41d94d6/packages/babel-generator/src/index.js#L32), which is responsible for generating code for a given AST.
+To get a better understanding of what is actually going on for this particular piece of code, we are going to make use of breakpoints.
+
+```diff
+generate() {
++ debugger; // breakpoint
+  return super.generate(this.ast);
+}
+```
+
+To include the changes, we have to make sure to build Babel:
+
+```bash
+$ make build
+```
+
+Next, we need to execute `Generator.generate()`, which can be achieved by running a test case in the `babel-generator` package.
+For example, we can run the test case that tests the generation of class declarations:
+
+```bash
+$ TEST_DEBUG=true TEST_GREP=ClassDeclaration make test-only
+
+./scripts/test.sh
+Debugger listening on port 9229.
+Warning: This is an experimental feature and could change at any time.
+To start debugging, open the following URL in Chrome:
+    chrome-devtools://devtools/remote/serve_file/@60cd6e859b9f557d2312f5bf532f6aec5f284980/inspector.html?experiments=true&v8only=true&ws=127.0.0.1:9229/3cdaebd2-be88-4e7b-a94b-432950ab72d0
+```
+
+To start the debugging in Chrome DevTools, open the given URL.
+The debugger starts at the first executed line of code, which is Mocha's first line by default.
+Click _Resume script execution_ <img src="https://i.imgur.com/TmYBn9d.png" alt="Resume script execution button." width="16"> to jump to the set breakpoint.
+Note that the code shown in Chrome DevTools is compiled code and therefore differs.
+
 #### Internals
 - AST spec ([babylon/ast/spec.md](https://github.com/babel/babylon/blob/master/ast/spec.md))
-- Versionning ([doc/design/versioning.md](./doc/design/versioning.md))
+- Versioning ([doc/design/versioning.md](./doc/design/versioning.md))
 - Monorepo ([doc/design/monorepo.md](./doc/design/monorepo.md))
 - Compiler environment support ([doc/design/compiler-environment-support.md](./doc/design/compiler-environment-support.md))
 - Compiler assumptions ([doc/design/compiler-assumptions.md](./doc/design/compiler-assumptions.md))

Makefile

@@ -49,11 +49,11 @@ test-only:
 test: lint test-only
 
 test-ci:
-	NODE_ENV=test make bootstrap
+	make bootstrap
 	make test-only
 
 test-ci-coverage:
-	NODE_ENV=test BABEL_ENV=cov make bootstrap
+	BABEL_ENV=cov make bootstrap
 	./scripts/test-cov.sh
 	./node_modules/.bin/codecov -f coverage/coverage-final.json
 

README.md

@@ -203,6 +203,14 @@ Babel | Daniel Tschinder | Logan Smyth | Henry Zhu |
 | [@kangax](https://github.com/kangax) | [@kaicataldo](https://github.com/kaicataldo) | [@motiz88](https://github.com/motiz88) | [@xtuc](https://github.com/xtuc) |
 | [@kangax](https://twitter.com/kangax) | [@kai_cataldo](https://twitter.com/kai_cataldo) | [@motiz88](https://twitter.com/motiz88) | [@svensauleau](https://twitter.com/svensauleau) |
 
+### Non-Human Members
+
+[<img src="https://github.com/babel/babel-bot/raw/master/babel-bot.png" height="64">](https://github.com/babel-bot) | 
+|---|
+| Babel Bot |
+| [@babel-bot](https://github.com/babel-bot) |
+| [@babeljs](https://twitter.com/babeljs) |
+
 ### Inactive members
 
 [![Amjad Masad](https://avatars.githubusercontent.com/u/587518?s=64)](https://github.com/amasad) | [![James Kyle](https://avatars.githubusercontent.com/u/952783?s=64)](https://github.com/thejameskyle) | [![Jesse McCarthy](https://avatars.githubusercontent.com/u/129203?s=64)](https://github.com/jmm) | [![Sebastian McKenzie](https://avatars.githubusercontent.com/u/853712?s=64)](https://github.com/kittens) (Creator) | 

codecov.yml

@@ -0,0 +1,4 @@
+coverage:
+  parsers:
+    javascript:
+      enable_partials: yes

package.json

@@ -1,4 +1,5 @@
 {
+  "name": "babel",
   "private": true,
   "license": "MIT",
   "scripts": {
@@ -44,6 +45,10 @@
     "through2": "^2.0.0",
     "uglify-js": "^2.4.16"
   },
+  "devEngines": {
+    "node": ">= 0.10 <= 7.x",
+    "npm": "2.x || 3.x || 4.x"
+  },
   "babel": {
     "comments": false,
     "presets": [

packages/babel-cli/test/fixtures/babel-node/arguments/in-files/bar.js

@@ -0,0 +1 @@
+console.log(process.argv[2]);

packages/babel-cli/test/fixtures/babel-node/arguments/options.json

@@ -0,0 +1,4 @@
+{
+  "args": ["bar", "foo"],
+  "stdout": "foo"
+}

packages/babel-core/src/transformation/file/options/option-manager.js

@@ -270,7 +270,7 @@ export default class OptionManager {
         }
         const presetFactory = this.getPresetFactoryForPreset(presetLoc || preset);
 
-        preset = presetFactory(context, options);
+        preset = presetFactory(context, options, { dirname });
 
         if (onResolve) onResolve(preset, presetLoc);
       } catch (e) {

packages/babel-generator/src/generators/statements.js

@@ -89,7 +89,6 @@ const buildForXStatement = function (op) {
       this.space();
     }
     this.token("(");
-
     this.print(node.left, node);
     this.space();
     this.word(op);

packages/babel-generator/src/node/parentheses.js

@@ -46,6 +46,10 @@ export function ObjectExpression(node: Object, parent: Object, printStack: Array
   return isFirstInStatement(printStack, { considerArrow: true });
 }
 
+export function DoExpression(node: Object, parent: Object, printStack: Array<Object>): boolean {
+  return isFirstInStatement(printStack);
+}
+
 export function Binary(node: Object, parent: Object): boolean {
   if ((t.isCallExpression(parent) || t.isNewExpression(parent)) && parent.callee === node) {
     return true;

packages/babel-generator/test/fixtures/parentheses/do-expression/actual.js

@@ -0,0 +1,3 @@
+(do {
+  foo;
+});

packages/babel-generator/test/fixtures/parentheses/do-expression/expected.js

@@ -0,0 +1,3 @@
+(do {
+  foo;
+});

packages/babel-plugin-transform-es2015-shorthand-properties/README.md

@@ -13,7 +13,7 @@ var o = { a, b, c };
 **Out**
 
 ```js
-var o = { a: a, b: b, c:c };
+var o = { a: a, b: b, c: c };
 ```
 
 **In**

packages/babel-plugin-transform-es2015-spread/README.md

@@ -11,7 +11,7 @@ var a = ['a', 'b', 'c'];
 var b = [...a, 'foo'];
 
 var c = { foo: 'bar', baz: 42 };
-var d = {...o, a: 2};
+var d = {...c, a: 2};
 ```
 
 **Out**
@@ -33,7 +33,7 @@ var a = [ 'a', 'b', 'c' ];
 var b = [].concat(a, [ 'foo' ]);
 
 var c = { foo: 'bar', baz: 42 };
-var d = _extends({}, o, { a: 2 });
+var d = _extends({}, c, { a: 2 });
 ```
 
 ## Installation

packages/babel-plugin-transform-react-constant-elements/README.md

@@ -6,15 +6,15 @@
 
 **In**
 
-```js
+```jsx
 const Hr = () => {
   return <hr className="hr" />;
 };
 ```
 
 **Out**
 
-```js
+```jsx
 const _ref = <hr className="hr" />;
 
 const Hr = () => {
@@ -26,13 +26,13 @@ const Hr = () => {
 
 - **Spread Operator**
 
-  ```js
+  ```jsx
   <div {...foobar} />
   ```
 
 - **Refs**
 
-  ```js
+  ```jsx
   <div ref="foobar" />
   <div ref={node => this.node = node} />
   ```

packages/babel-runtime/package.json

@@ -1,6 +1,6 @@
 {
   "name": "babel-runtime",
-  "version": "6.22.0",
+  "version": "6.23.0",
   "description": "babel selfContained runtime",
   "license": "MIT",
   "repository": "https://github.com/babel/babel/tree/master/packages/babel-runtime",
@@ -11,6 +11,6 @@
   },
   "devDependencies": {
     "babel-helpers": "^6.22.0",
-    "babel-plugin-transform-runtime": "^6.22.0"
+    "babel-plugin-transform-runtime": "^6.23.0"
   }
 }

packages/babel-traverse/test/scope.js

@@ -14,6 +14,19 @@ function getPath(code) {
   return path;
 }
 
+function getIdentifierPath(code) {
+  const ast = parse(code);
+  let nodePath;
+  traverse(ast, {
+    Identifier: function(path) {
+      nodePath = path;
+      path.stop();
+    }
+  });
+
+  return nodePath;
+}
+
 describe("scope", function () {
   describe("binding paths", function () {
     it("function declaration id", function () {
@@ -67,5 +80,13 @@ describe("scope", function () {
         _foo2: { }
       `).scope.generateUid("foo"), "_foo3");
     });
+
+    it("reference paths", function() {
+      const path = getIdentifierPath("function square(n) { return n * n}");
+      const referencePaths = path.context.scope.bindings.n.referencePaths;
+      assert.equal(referencePaths.length, 2);
+      assert.deepEqual(referencePaths[0].node.loc.start, { line: 1, column:28 });
+      assert.deepEqual(referencePaths[1].node.loc.start, { line: 1, column:32 });
+    });
   });
 });